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Technology

Acromove products incorporate innovative thinking about the latest proprietary and COTS technologies to deliver
superior performance and user experience.

Disk Storage System

All our systems come with a choice of hardware RAID cards, depending on the features you need.  The main issues of which card to use involve rebuild speed, SAS expansion, connection to external LTO, and encryption. All the cards we offer include RAID 0/1/3/5/6/10/50/60/JBOD, and support HDDs and SSDs.

ThunderPack Mini™ has an 8 bay 2.5” 15mm 12G SAS3/SATA3 disk array. The capacities we offer range from 8TB to 40TB. It uses the new Highpoint RR3740 12G SAS hardware Raid controller which is installed in a Thunderbolt 2 to PCIe v.3 bridge and delivers speeds that exceed 1000MB/s or more, up to 1300MB/sec depending on the drives being used. Acromove designs our own 12G disk backplanes for reliability and performance.

ThunderPack™ and ServerPack™ have a 24 bay 15mm 12G SAS3/SATA3 disk array. Capacities in these units range from 24TB to 120TB. Their data transfer rate with hardware RAID-6 controller exceeds 1,300MB/s, and as high as 2300MB/s with SSDs.

We only use 2.5” disks (both laptop HDD and SSD) for several important reasons. While both HGST and Seagate now offer 10TB HDDs (12TB disks are on the horizon, too), using fewer large disks to achieve high capacity carries with it several drawbacks. Using many smaller disk drives has several advantages. By standardizing on the 2.5” form factor, precious space is not wasted to accommodate the larger drives.

  • Large capacity HDDs are subject to damage from external shock. Here is a comparison chart for a couple of models:

 

Model Size Cap. Environmental Specification
Seagate ST5000LM000 2.5” 5TB Shock, Operating 2ms 300 Gs
      Shock, Non-Operating 1ms 650 Gs
Seagate ST2000LM015 2.5” 2TB Shock, Operating 2ms 400 Gs
      Shock, Non-Operating 1ms 1000 Gs
HGST HUH721010ALE600 3.5” 10TB Shock, Operating 2ms 70 Gs
      Shock, Non-Operating 2ms 300 Gs
HGST  Ultrastar 7K6000 3.5” 2TB Shock, Operating 2ms 70 Gs
      Shock, Non-Operating 1ms 300 Gs

 

  • Large capacity HDDs use more power. Our use of 2.5” HDDs means our units can operate on batteries.

 

Model Size Cap. Environmental Specification
Seagate ST5000LM000 2.5” 5TB Read/write Power 1.9/2.1 W
      Idle Power 1.1 W
Seagate ST2000LM015 2.5” 2TB Read/write Power 1.7/1.8 W
      Idle Power 0.5
HGST HUH721010ALE600 3.5” 10TB Read/write Power, Average 6.8 W
      Idle Power 5.0 W
HGST  HUS7260xxALN61y 3.5” 2TB Read/write Power, Average 9.1 W
      Idle Power 7.1 W

 

  • Large capacity HDDs are heavier per equal storage space. Our lower total weights mean shipping charges are lower. Notice the 2TB 3.5” HDDs weigh more than the 10TB model.

 

Model Size Cap. Environmental Specification
Seagate ST5000LM000 2.5” 10TB Weight (two 5TB drives at 190 grams) 380 grams
Seagate ST2000LM015 2.5” 2TB Weight 90 grams
HGST HUH721010ALE600 3.5” 10TB Weight 660 grams
HGST  HUS7260xxALN61y 3.5” 2TB Weight 715 grams

 

  • When using large capacity HDDs in RAID 5 or 6 configurations, a lot of that capacity is sacrificed for the parity drives. In a RAID 5 array, one disk is used for parity, in RAID 6 two disks are used. Smaller capacity HDDs give up less storage space and rebuild times are significantly faster.

 

Brand Size Capacity RAID Usable
Acromove ServerPack 2.5” 24 drives x 5TB = 120TB 5 115TB
AWS Snowball Edge 3.5” 10 drives x 10TB = 100TB 5 90TB
Acromove ThunderPack 2.5” 24 drives x 4TB = 96TB 5 92TB
         
Acromove ServerPack 2.5” 24 drives x 5TB = 120TB 6 110TB
AWS Snowball Edge 3.5” 10 drives x 10TB = 100TB 6 80TB
Acromove ThunderPack 2.5” 24 drives x 4TB = 96TB 6 88TB
         

 

  • Large HDDs cost more money, especially when the new higher capacity models are first introduced. Seagate 2.5” laptop drives are a proven commodity, and recently they introduced a 5TB model.

 

Model Size Cap. Environmental Specification
Seagate ST5000LM000 2.5” 10TB Street price (two 5TB at $210) $420
Seagate ST2000LM015 2.5” 2TB Street price $98
HGST HUH721010ALE600 3.5” 10TB Street price $495
HGST  HUS7260xxALN61y 3.5” 2TB Street price $127

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